Text & Developer Tools
Text & Developer Tools Calculators
Inspect, transform, validate, and improve text, metadata, and structured content.
18 tools
Keyword Density Calculator
Keyword density calculator: measure keyword frequency and density percentages in any text to keep your SEO copy natural. Free, private, in-browser, no signup.
Morse Code Converter
Morse code converter: translate text into international Morse code, or decode dots and dashes back into text instantly. Free, private, in-browser, no signup.
UUID Generator
UUID generator: create random UUID v4 identifiers instantly, one at a time or in bulk, ready to copy anywhere. Free, runs locally in your browser, no signup.
AI Citation Readiness Checker
Audit your robots.txt, llms.txt, and page HTML for AI-crawler access and citation-readiness. Three evidence-based layers, instant results, nothing uploaded.
Brand Context Audit
Score how clearly AI assistants can read, categorize, and recommend your business from your own copy. Six deterministic checks, instant results, private.
Email Preview Tester
Email preview tester: check how your subject line and preheader render in Gmail, mobile inboxes, and truncated views before you send. Free, no signup.
JSON Formatter
JSON formatter and validator: pretty print, beautify and validate JSON online with instant error locations. Free, private, runs in your browser, no signup.
Password Generator
Password generator: create strong, random passwords with custom length, symbols, numbers, and character rules. Free, runs locally in your browser, no signup.
Slug Generator
URL slug generator: slugify any text into SEO friendly, url friendly slugs for your blog posts and landing pages. Free, private, runs in browser, no signup.
AI Visibility Checker
AI visibility checker: run a guided audit across ChatGPT, Perplexity, Gemini and Copilot with ready-made prompts, score your mentions, and get honest fixes. Free, private, runs in your browser.
Color Picker
Color picker: pick any color and convert between HEX, RGB, and HSL values with copy-ready codes for design and web work. Free, private, no signup needed.
Country Facts and Comparison
Country facts: look up and compare population, area, flags, currency, and other key data for countries of the world by region. Free, runs in your browser.
Folder to Prompt
Folder to prompt: turn a codebase folder into one organized prompt with full file tree and source code for LLM context. Free, runs locally, no upload.
Meta Tag Generator
Meta tag generator: build SEO title, description, robots, and Open Graph tags with a live preview of search and social share results. Free, no signup.
Readability Calculator
Readability calculator: score any text with Flesch Kincaid grade level and reading ease to check comprehension. Free, runs in your browser, no signup.
Subnet Calculator
Subnet calculator: convert an IPv4 address and CIDR mask into network, broadcast, wildcard, and usable host ranges instantly. Free, runs in your browser.
Typing Test
Typing test: measure your typing speed in WPM and accuracy in one minute, with instant results and an error breakdown. Free, private, no signup required.
Word Counter
Word counter: count words, characters, sentences and paragraphs in any text as you type or paste it in. Free, private, runs in your browser, no signup.